QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

35 km WSW of Loma, Colorado

· 11 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grand County 35 kmMesa County 62 kmMontrose County 106 kmDelta County 115 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.8 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Grand County, 35 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 433 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 39.0465, -109.1780. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grand County, UT 35 km (22 mi) ENE of here earthquakes near Grand County
Mesa County, CO 62 km (39 mi) W of here earthquakes near Mesa County
Montrose County, CO 106 km (66 mi) NW of here earthquakes near Montrose County
Delta County, CO 115 km (72 mi) W of here earthquakes near Delta County
Garfield County, CO 125 km (78 mi) WSW of here earthquakes near Garfield County
San Miguel County, CO 133 km (82 mi) NNW of here earthquakes near San Miguel County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

2 earthquakes have been recorded within 50 km since this one.

  1. 1.7 37 km NE of Thompson Springs, Utah
  2. 2.3 35 km SW of Loma, Colorado

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.